It will have three small raised marks molded into the shank of the blade. Unless you have had the prop refinished with DuraSkin you should be able to find them. Look right along where it goes into the hub and generally they will be in proximity to where the outer clamshell and base join in that sea...

I run a 72 in three blade Ngq on my 540, I had a 2 blade Ngq and a 6 blade warp before that. I'm happy with the 3 blade. I do miss the warp snap though. mwood7800 are you running an AV540? what mark are your blades pitched at and what is your sweet spot WOT? thanks! :rebel: It is an AV. My marks ha...

My 540 did the same thing a couple years ago, call Jurnigan for info on which way it comes out, mine screwed out the same side as the broken stud and I only had to take off 1 cylinder and the opposing nut on the other side. Jr had a stud, I had a local machine shop make me a couple out of harder ste...